Preheat oven to 350F
Line two 9X5 metal loaf pans with greased parchment paper.
In a bowl, combine flour, baking soda and salt.
In a large bowl, using an electric mixer, beat oil and sugar. Add eggs to mixture one at a time, beating well after each addition.
Add bananas and vanilla and beat well.
Combine both the wet and dry mixtures and combine until smooth.
Stir in chocolate chips and walnuts if using them.
Spread batter evenly in prepared pans.
Bake in a preheated oven for 60 to 65 minutes.
Let cakes cool for 15 minutes before removing from the pans.
